Full-automatic free silicon dioxide pretreatment device
By improving the heating device and sample cup structure, uniform heating of the fully automated free silica pretreatment device was achieved, solving the error problem in the sample digestion process and improving the accuracy and efficiency of detection.
Patent Information
- Application Number
- CN202423133021.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-18
- Publication Date
- 2025-12-05
- Estimated Expiration
- 2034-12-18
AI Technical Summary
Existing fully automated free silica pretreatment devices suffer from uneven heating during sample digestion, leading to large errors in detection results and affecting detection accuracy.
A heating device and sample cup structure were designed, including a matrix-arranged heating bath and a rotating stirring rod. Combined with a temperature sensor, dual temperature control is achieved to ensure that the liquid temperature in the sample cup is between 245℃ and 250℃, thereby improving heating efficiency and uniformity.
It achieves uniform heating of samples, reduces experimental errors, improves the accuracy and efficiency of detection, simplifies labor, and reduces errors caused by human factors.
Smart Images
Figure CN223637224U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to detection pretreatment device technical field, concretely relates to a full -automatic free silicon dioxide pretreatment device. BACKGROUND
[0002] Pneumoconiosis is caused by long-term inhalation of a large amount of free silicon dioxide and other dust, which leads to interstitial lung disease. According to the national occupational health standards of the People's Republic of China, "Determination of Dust in the Air of Workplace Part 4: Free Silica Content" GBZ / T192.4-2007, there are three methods for determining free silica, namely, pyrophosphoric acid method, X-ray diffraction method and infrared spectrophotometry. Among them, the pyrophosphoric acid method is a commonly used analysis method for detecting free silica because of its stable detection, simple pretreatment, high accuracy and less interference.
[0003] Before the pyrophosphoric acid method is detected, the sample needs to be pretreated. The pretreatment mainly includes digestion and filtration of the sample. When digesting, the temperature must be strictly controlled between 245℃-250℃. If the temperature is too low, the silicate in the dust will not be completely dissolved, resulting in a low result. If the temperature is too high, it is easy to form a gelatinous precipitate, resulting in a high result. The existing device often causes heating errors during sample digestion because of the traditional design of the heating structure and the sample cup. When heating through an electric stove and a beaker-shaped sample cup, it often causes heating errors, affecting the subsequent detection results.
[0004] Therefore, it is urgent to improve the structure of the existing full-automatic free silica pretreatment device, especially the heating structure and the sample cup corresponding to the heating structure, to improve the overall detection accuracy. SUMMARY
[0005] To solve the problems existing in the prior art, the utility model provides a full-automatic free silica pretreatment device, which can ensure uniform heating, reduce experimental errors and improve the accuracy of detection through the structural design of the heating device and the sample cup.
[0006] The technical scheme of the utility model comprises:
[0007] The application discloses a full-automatic free silicon dioxide pretreatment device which comprises a shell and a sample cup, a sample rack driving mechanism, a liquid adding and stirring mechanism, a heating mechanism, a cooling mechanism and a suction filtration mechanism arranged in the shell.
[0008] Further, the sample cup is arranged in a plurality of forms, the plurality of sample cups are arranged on a sample rack, and the sample rack is arranged in a rectangular rack body and is connected with the sample rack driving mechanism.
[0009] Further, the sample rack driving mechanism comprises two groups of moving plates arranged in a symmetrical mode, two groups of horizontal guide rails and a group of horizontal driving components, and the moving plates are perpendicular to the horizontal guide rails.
[0010] Further, the liquid adding and stirring mechanism comprises a fixed plate, two groups of vertical guide rails, a plurality of liquid adding heads and a plurality of stirring rods corresponding to the liquid adding heads.
[0011] Further, the stirring rod is a rotary stirring rod, and uniform stirring is guaranteed.
[0012] Further, the stirring rod comprises a rod body in a rod structure and a stirring head in a boat-shaped structure arranged at the bottom of the rod body and integrated with the rod body, so that the sample at the bottom of the cup can be fully stirred, and the stirring efficiency is improved.
[0013] Further, the cooling mechanism is arranged on one side of the heating mechanism and comprises a cooling table and a fan, and the fan is arranged in a plurality of forms and horizontally arranged at the bottom of the cooling table.
[0014] Further, the suction filtration mechanism comprises a sampling tube, a bubble stirring rod, a flushing nozzle, a sample outlet head, a negative pressure funnel and an xyz-axis driving assembly.
[0015] Further, the sample outlet head is a rotary sample outlet head, which improves the filtration efficiency and avoids blockage.
[0016] Further, the rotary sample outlet head comprises a motor, a rotary driving assembly and a sample outlet tube, the rotary driving assembly is arranged in an L-shaped structure, the rotary driving assembly is connected with the output end of the motor, and the sample outlet tube is perpendicular to the bottom of the rotary driving assembly.
[0017] Further, the negative pressure funnel comprises an inner filter layer and an outer drainage layer, the inner filter layer and the outer drainage layer are arranged in an integrated structure, and a negative pressure cavity is arranged between the inner filter layer and the outer drainage layer.
[0018] The beneficial effects achieved by the utility model are as follows:
[0019] 1. The full-automatic free silicon dioxide pretreatment device improves the heating efficiency and the accuracy of heating by improving the structure of the heating mechanism and the sample cup.
[0020] 2. The full-automatic free silicon dioxide pretreatment device can realize the experimental process without manual intervention, simplify the labor, save the experimental time, improve the experimental speed, reduce the error caused by human factors and improve the accuracy of experimental results. BRIEF DESCRIPTION OF DRAWINGS
[0021] Fig. 1 is a schematic view of the overall structure inside the shell of the utility model.
[0022] Fig. 2 is another angle structure schematic view of the shell inside the utility model.
[0023] Fig. 3 is a structure schematic view of the sample cup in the utility model.
[0024] Fig. 4 is a structure schematic view of the heating mechanism in the utility model.
[0025] Fig. 5 is a schematic view of the sample holder driving mechanism, the liquid adding stirring mechanism and the cooling mechanism in the utility model.
[0026] Fig. 6 Figure is the structure diagram of the stirring rod in the utility model.
[0027] Fig. 7 Figure is the structure diagram of the negative pressure funnel mechanism in the utility model.
[0028] In the figure, 1, suction filtration mechanism; 11, sampling tube; 12, xyz axis driving assembly; 13, rotating sample head; 131, rotating driving assembly; 14, negative pressure funnel; 141, inner filter layer; 142, negative pressure cavity; 143, outer drainage layer; 144, filter hole; 15, flushing nozzle; 16, bubble stirring rod; 2, sample rack; 3, sample cup; 31, cup body; 32, sample groove; 4, heating mechanism; 41, heating groove; 5, sample rack driving mechanism; 51, moving plate; 52, horizontal guide rail; 53, horizontal driving assembly; 6, cooling mechanism; 7, liquid adding stirring mechanism; 71, fixed plate; 72, vertical guide rail; 73, liquid adding head; 74, stirring rod; 741, rod body; 742, stirring head; 75, sample rack lifting plate. DETAILED DESCRIPTION
[0029] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be described clearly and completely below in combination with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. The components of the embodiments of the utility model described and shown in the drawings can be arranged and designed in various different configurations.
[0030] Therefore, the following detailed description of the embodiments of the utility model provided in the drawings is not intended to limit the scope of the claimed utility model, but only represents the preferred embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the utility model.
[0031] It should be noted that: similar reference numbers and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.
[0032] In the description of the utility model, it needs to explain, the term "upper", "lower", "left", "right", "vertical", "horizontal", "internal", "external" and so on indicate the orientation or positional relationship is based on the orientation or positional relationship shown in the drawing, or it is the orientation or positional relationship of the utility model product when using usually, only for the convenience of describing the utility model and simplifying the description, and cannot indicate or imply that the indicated device or element must have a particular orientation, construct and operate in a particular orientation, therefore cannot be understood as a limitation on the utility model. In addition, the terms "first", "second", "third" and the like are only used for differentiation, and cannot be understood as indicating or implying relative importance. In the description of the utility model, unless otherwise specified, the meaning of "a plurality of" is two or more.
[0033] In the description of the utility model, it also needs to explain that, unless otherwise specified and limited, the terms "set", "connected" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected, it can be mechanically connected, or it can be electrically connected. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.
[0034] In the utility model, unless otherwise specified and limited, the "upper" or "lower" of the first feature to the second feature can include that the first and second features are in direct contact, or the first and second features are not in direct contact but are in contact through another feature between them. Moreover, the "upper", "upper" and "upper" of the first feature to the second feature include that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The "below", "below" and "below" of the first feature to the second feature include that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.
[0035] The embodiments of the utility model are described in detail below, and the examples of the embodiments are shown in the drawings, wherein the same or similar reference signs represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary, only for explaining the utility model, and cannot be understood as a limitation on the utility model.
[0036] As Figs. 1-7 The utility model provides a kind of full-automatic free silicon dioxide pretreatment device, including shell and the sample cup 3 of being set in shell, sample rack drive mechanism 5, liquid adding stirring mechanism 7, heating mechanism 4, cooling mechanism 6 and suction filtration mechanism 1. The door of the door of open-close door structure is provided on the front wall of the shell, and the upper end of the door is provided with control panel. The upper end of the shell is provided with exhaust cylinder, and the rear end base of shell is provided with power plug.
[0037] The sample rack driving mechanism 5 drives the sample cup 3 to move in the heating mechanism 4 and the cooling mechanism 6, facilitating the heating and cooling of the sample. The liquid adding and stirring mechanism 7 is connected with the sample rack driving mechanism 5 and moves with the sample rack driving mechanism 5. The suction filtration mechanism 1 is connected with the sample in the sample cup 3, facilitating the negative pressure suction of the sample and the subsequent filtration.
[0038] Specifically, the structure of the sample cup 3 is specially designed. The sample cup 3 comprises a cup body 31 and a sample groove 32 integrally formed with the cup body 31 and in communication with the cup body 31. In the embodiment, the cup body 31 is provided in a hollow cylindrical structure. The sample groove 32 is provided on the bottom of the cup body 31 and protrudes downward, in a spherical or inverted n-shaped structure. In the embodiment, the structure of the sample groove 32 is an inverted n-shaped structure. After the sample is added, the sample is concentrated in the sample groove 32, facilitating the concentration and rapid heating of the sample and improving the heating efficiency. In order to improve the efficiency in the later suction filtration process and ensure clean suction filtration, the top opening of the sample groove 32 is smaller than the bottom surface diameter of the cup body 31. When the sample is taken, the sample is concentrated at the bottom of the cup, facilitating the concentrated and uniform heating and the subsequent rapid suction filtration. In the embodiment, the sample cup 3 is provided in 10, and the 10 sample cups 3 are arranged on the sample rack 2. The sample rack 2 is provided in a rectangular rack body and is connected with the sample rack driving mechanism 5.
[0039] The heating mechanism 4 comprises a heating block connected with a power supply. The top of the heating block is provided with a plurality of downward recessed heating grooves 41 arranged in a matrix. The shape of the heating grooves 41 matches the shape of the sample groove 32. During the heating process, the sample groove 32 is covered by the heating grooves 41, and the heating is rapid and uniform. The sample is heated to 245-250℃ within 10 minutes and kept constant, with a temperature error of ≤±1℃.
[0040] The sample rack driving mechanism 5 comprises two groups of moving plates 51 arranged symmetrically, two groups of horizontal guide rails 52 and one group of horizontal driving assemblies 53. In the embodiment, the horizontal driving assembly 53 is provided as a driving motor. The moving plates 51 are perpendicular to the horizontal guide rails 52. The liquid adding and stirring mechanism 7 is connected with the two groups of moving plates 51 and can move up and down on the two groups of moving plates 51 through a screw rod structure.
[0041] The liquid adding and stirring mechanism 7 comprises a fixed plate 71, two groups of vertical guide rails 72, a plurality of liquid adding heads 73 and a plurality of stirring rods 74 corresponding to the plurality of liquid adding heads 73. The fixed plate 71 is vertically arranged between the two groups of moving plates 51, the two groups of vertical guide rails 72 are arranged on the two groups of moving plates 51 respectively, and the fixed plate 71 is connected with the two groups of vertical guide rails 72. The two sides of the fixed plate 71 are also connected with a sample rack lifting plate 75 for lifting the sample rack 2 horizontally to the heating mechanism 4 or the cooling mechanism 6. The plurality of liquid adding heads 73 and the plurality of stirring rods 74 are fixed adjacent to the fixed plate 71. The stirring rod 74 is provided with a temperature sensor, and through the temperature sensor on the stirring rod 74 and the temperature sensor arranged on the heating mechanism 4, the temperature of the liquid in the sample cup during digestion is controlled between 245-250℃ through the double temperature control of the two temperature sensors.
[0042] The stirring rod 74 comprises a rod body 741 in a rod structure and a stirring head 742 in a boat-shaped structure integrally formed at the bottom of the rod body 741, which facilitates sufficient stirring of the sample at the bottom of the cup and improves the stirring efficiency. In order to further improve the stirring efficiency, the stirring rod 74 is a rotary stirring rod.
[0043] The cooling mechanism 6 is arranged on one side of the heating mechanism 4 and comprises a cooling table and a fan. The fan is provided with a plurality of fans, and in the embodiment, the fan is arranged as three fans with a spacing distance and is horizontally arranged at the bottom of the cooling table for cooling the sample in the sample cup 3.
[0044] The suction filtration mechanism 1 comprises a sampling pipe 11, a bubble stirring rod 16, a flushing nozzle 15, a sample outlet head, a negative pressure funnel 14 and an xyz axis driving assembly 12. The bubble stirring rod 16 and the flushing nozzle 15 are arranged on the two sides of the sampling pipe 11 respectively. The flushing nozzle 15 is fixed at a height close to the cup opening of the sample cup 3, which is used for acid washing and water flushing of the sample cup 3. The bubble stirring rod is used for stirring the sample in the sample cup 3. The bubble stirring rod comprises an internally hollow rod body, and a gas pump is connected to the rod body for stirring by blowing and bubbling to ensure sufficient stirring. The flushing nozzle is used for flushing the sample cup 3. It also comprises a sample outlet head, a negative pressure funnel 14 and an xyz axis driving assembly 12. The sampling pipe 11 and the sample outlet head are arranged on and communicated with the xyz axis driving assembly 12, and the negative pressure funnel 14 is arranged on one side of the heating mechanism 4 through a funnel holder and opposite to the cooling mechanism 6. Specifically, the sample outlet head is arranged as a rotary sample outlet head 13. The efficiency of filtration is improved and clogging is avoided. It comprises a motor, a rotary driving assembly 131 and a sample outlet pipe. The rotary driving assembly 131 is arranged in an L-shaped structure, the rotary driving assembly 131 is connected with the output end of the motor, and the sample outlet pipe is perpendicular to the bottom of the rotary driving assembly 131. The sample outlet head is driven by the xyz axis driving assembly 12 to move horizontally, and the sampling pipe 11 is driven by the xyz axis driving assembly 12 to move horizontally and vertically.
[0045] The negative pressure funnel 14 comprises an inner filter layer 141 and an outer drainage layer 143, which are arranged as an integrated structure and a negative pressure cavity 142 is arranged between the inner filter layer 141 and the outer drainage layer 143. A plurality of filter holes 144 are arranged on the side wall of the inner filter layer 141 in a circumferential direction. Through the improvement on the structure of the existing filter funnel, in the specific filtering process, the gravity of the filtrate in the filtering process is dispersed through the arrangement of the filter holes 144 on the side wall of the inner filter layer 141, so that the rupture of the filter paper is greatly reduced. Moreover, through the structure arrangement that the negative pressure cavity 142 is arranged between the outer drainage layer 143 and the inner filter layer 141, the negative pressure suction filtering is used, so that the filtering speed is greatly improved. Compared with the filtering of the existing traditional funnel, the filtering speed of the filtering funnel of the utility model can be increased by at least 5 times, and the working efficiency is greatly improved.
[0046] In the specific use process, the sample to be digested is first placed in the sample cup 3 on the sample rack 2 in the device, the door of the device is closed, and the corresponding parameters are set through the control panel. First, the heating mechanism 4 heats the sample in the sample cup 3, a temperature sensor is arranged on the heating mechanism 4, and the heating mechanism 4 stops working after heating is completed. A temperature sensor is arranged on the stirring rod 74, which is convenient for real-time monitoring of the temperature of the sample in the sample cup 3 and further control of the subsequent controller. After digestion is completed, the sample rack driving mechanism 5 drives the sample rack 2 to move horizontally to the cooling table, the fan in the cooling mechanism 6 operates, and cooling is performed. After cooling to the set temperature, the sample rack 2 is driven to the heating mechanism 4, and the heating mechanism 4 is not started. The liquid adding and stirring mechanism 7 starts to work, and the sample is diluted by adding clean water to the sample cup 3 while stirring, and the water is added twice. After dilution is completed, the sample driving mechanism moves to the upper side of the cooling mechanism 6, the filter extraction mechanism 1 works, the sample is taken through the sampling pipe 11 and then transported to the sample outlet head 13 to rotate the sample for filtering above the negative pressure funnel 14, and then the sample is washed with clean water for multiple times after acid washing for three times, until the filtrate is neutral. After filtering is completed, the filter paper is removed, and subsequent detection is performed.
[0047] The above-mentioned embodiments of the utility model do not constitute the limitation to the protection scope of the utility model. Any modification, equivalent replacement and improvement within the spirit and principle of the utility model should be included in the protection scope of the claim of the utility model.
Claims
1. A fully automatic free silica pretreatment device characterized by: The utility model provides a kind of sample preparation device, including shell and the sample cup (3) being arranged in shell, sample rack driving mechanism (5), liquid adding stirring mechanism (7), heating mechanism (4), cooling mechanism (6) and suction filtration mechanism (1);The sample rack driving mechanism (5) drives sample cup (3) to move in heating mechanism (4) and cooling mechanism (6), the liquid adding stirring mechanism (7) is connected with sample rack driving mechanism (5), and the suction filtration mechanism (1) is connected with sample in sample cup (3);The sample cup (3) includes cup body (31) and the downwardly protruding sample groove (32) of integrally formed and intercommunication with cup body (31), the top opening of the sample groove (32) is less than the bottom surface diameter of cup body (31);The heating mechanism (4) includes heating block, the heating block is connected with power supply, and the top of the heating block is provided with a plurality of downwardly recessed heating grooves (41), and the shape of the heating groove (41) is matched with the sample groove (32).
2. A fully automatic free silicon dioxide pretreatment device according to claim 1, characterized in that: The sample rack driving mechanism (5) includes two groups of moving plates (51) arranged symmetrically, two groups of horizontal guide rails (52) and a group of horizontal driving assemblies (53), the moving plate (51) is perpendicular to the horizontal guide rail (52);The liquid adding stirring mechanism (7) is connected with two groups of moving plates (51), and can move up and down on two groups of moving plates (51).
3. A fully automatic free silica pretreatment device according to claim 2, characterized in that: The liquid adding stirring mechanism (7) includes a fixed plate (71), two groups of vertical guide rails (72), a plurality of liquid adding heads (73) and a plurality of stirring rods (74) corresponding to the plurality of liquid adding heads (73);The fixed plate (71) is vertically arranged between two groups of moving plates (51), the two groups of vertical guide rails (72) are respectively arranged on two groups of moving plates (51), and the fixed plate (71) is connected with the two groups of vertical guide rails (72);The plurality of liquid adding heads (73) and the plurality of stirring rods (74) are fixed adjacent to the fixed plate (71);The stirring rod (74) is provided with a temperature sensor.
4. A fully automatic free silica pretreatment device according to claim 3, characterized in that: The stirring rod (74) is a cantilever stirring rod.
5. A fully automatic free silica pretreatment device according to claim 3, characterized in that: The stirring rod (74) includes a rod body (741) of rod structure and a stirring head (742) of boat-shaped structure arranged at the bottom of the rod body (741) and integrally formed with the rod body (741).
6. A fully automatic free silica pretreatment device according to claim 1, characterized in that: The cooling mechanism (6) is arranged on one side of the heating mechanism (4), and includes a cooling table and a fan, the fan is provided with a plurality of fans, and is horizontally arranged at the bottom of the cooling table.
7. A fully automatic free silica pretreatment device according to claim 1, characterized in that: The suction filtration mechanism (1) includes a sampling tube (11), a bubble stirring rod (16), a flushing nozzle (15), a sample outlet head, a negative pressure funnel (14) and an xyz-axis driving assembly (12);The sampling tube (11) and the sample outlet head are arranged on the xyz-axis driving assembly (12) and are communicated;The bubble stirring rod (16) and the flushing nozzle (15) are arranged on both sides of the sampling tube (11) respectively;The bubble stirring rod (16) is used for stirring the sample in the sample cup (3);The flushing nozzle (15) is used for pickling and water flushing of the sample cup (3);The negative pressure funnel (14) is arranged on one side of the heating mechanism (4) through a funnel frame, and is arranged opposite to the cooling mechanism (6).
8. A fully automated free silica pretreatment device according to claim 7, characterized in that: The sample outlet head is arranged as a rotary sample outlet head (13).
9. A fully automated free silica pretreatment device according to claim 8, characterized in that: The rotary sample outlet head (13) comprises a motor, a rotary driving assembly (131) and a sample outlet pipe, the rotary driving assembly (131) is arranged in an L-shaped structure, the rotary driving assembly (131) is connected with the output end of the motor, and the sample outlet pipe is perpendicular to the bottom of the rotary driving assembly (131).
10. A fully automatic free silica pretreatment device according to claim 7, characterized in that: The negative pressure funnel (14) comprises an inner filter layer (141) and an outer drainage layer (143), the inner filter layer (141) and the outer drainage layer (143) are arranged in an integrated structure, and a negative pressure cavity (142) is arranged between the inner filter layer (141) and the outer drainage layer (143); a plurality of filter holes (144) are circumferentially arranged on the side wall of the inner filter layer (141).